• Assistant Clinical Professor, Department of Periodontics                 2001-Present
• Medical College of Virginia - Virginia Commonwealth University
• Assistant Clinical Professor,   Department of Periodontics               1997-2001
• University of Maryland at Baltimore
• Dr. Christopher was one of the faculty selected by the dental class of 1999 (U. of Maryland) to present the graduating seniors their Doctor of Dental Surgery (D.D.S.) degrees.
• Clinical Instructor, Department of Periodontology                           1994-1997
• The Ohio State University

• American Academy of Periodontology - member & appointed to New Practioner Committee 2003-2004
• American Board of Periodontology: Board certified (Diplomate)
• American Dental Association
• International & American Association for Dental Research
• Academy of Osseointegration
• Virginia Dental Society
• Northern Virginia Dental Society

Low incidence of colonization with Porphyromonas gingivalis among dental students. Christopher LA*, Griffen AL, Leyes EJ. Journal of Dental Research 1996;75 (Special issue, abstract # 2694)

* Presented at the International Association for Dental Research (IADR) annual meeting, San Francisco, California; March 1996.

Prevalence of Porphyromonas gingivalis strains in health and disease. Rosel MM, Griffen AL, Christopher LA, Lyons SR, DeVore CH, Leyes EJ. Journal of Dental Research 1996;75 (special issue abstract # 1975)

The longitudinal assessment of soft tissues around endosseous implants L. A. Christopher, B.S., D.D.S., M.S.

Master of Science thesis. Graduate School, The Ohio State University press, 1997. Examination committee members: E. McGlumphy, D.D.S., M.S.; L. Peterson, D.D.S., M.S.; O'Neil J., D.D.S.

Anatomic variations of the temporalis muscle & MRI characteristics of odontogenic keratocysts. Dept. of Oral & Maxillofacial Surgery, The University of Illinois at Chicago. Christopher LA, Heffez L. Christopher LA, Heffez L.

A non-radioactive assay to determine monocyte viability. Dept. of Immunology, Rush-Presbyterian-St. Luke's Medical Center; Christopher LA, Zeller J.Christopher LA, Zeller J.